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Shall consist of new, clean, uncoated and unpainted
aluminum scrap of two or more alloys with a minimum
thickness of .015" (.38 mm) and to be free of hair wire,
wire screen, dirt and other non-metallic items.
Oil and
grease not to total more than 1%. Also free from
punchings less than 1/2" (1.27 cm) in size.
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